这是一个很俗很low的寒暄;给你看看城市词典的解释吧 What's up An extremely annoying question that has (unfortunately) replaced "Hello" or "Hi" as the most popular form of casual greeting. For full effect, best delivered while walking past someone at about 90 m.p.h. so the person you're talking to has no time to respond, and in a tone that suggests you really don't give a shit about "what's up" with them. Dude #1: "Hey, man. What's up?" Dude #2: "Uh..." (what he managed to get out before Dude #1 was already too far away to hear the rest of what he was going to say) 随便翻译一下: What's up 这是一个(不幸地)代替了原本最常用的日常问候语“Hello" 或者 "Hi"的一个极其惹人厌的提问。要达到它的最佳效果,最好是以别人无法回应的速度,比如90mph(145码),超过某人时,再用一种表现出你对他们到底怎么样其实完全不屑一顾的口气来说出这句话。 (情景) 路人1:“Hey, man. What's up?" 路人2:”Uh......."(这就是他在路人1走远之前还能说的让路人1听到的全部话了)